right now, I have a 120 that has nothing but LR in it. The LR is in bad shape, and so is the water... this tank has had nothing but a few chromis in it. It's a long story. Anyway, I'm going to do a major water change and focus on reconditioning the LR for a few months because I'll be moving soon. I'm thinking about yanking the sand and plenum and going barebottom instead. What are your thoughts on plenums? Right now I'm about 70% sure I'm gonna pull it. Any strong arguments for keeping it?